{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The kinetics of alkaline fading of crystal violet ( CV ) has been studied by UV spectrophotometry and microcalorimetry in the critical binary solution of 2 - butoxyethanol + water at the initial reaction stage and various temperatures ."}
{"Chemical": ["crystal violet", "2 - butoxyethanol"]}